From postfix-users  Tue Sep 24 11:10:51 2019
From: Matus UHLAR - fantomas <uhlar () fantomas ! sk>
Date: Tue, 24 Sep 2019 11:10:51 +0000
To: postfix-users
Subject: Re: Suggestions for less spam
Message-Id: <20190924111051.GA635 () fantomas ! sk>
X-MARC-Message: https://marc.info/?l=postfix-users&m=156932351120880

>> > On 24.09.19 12:11, Paul van der Vlis wrote:
>> > >I am using now much of your setting and it seems to help. Thanks a lot!

>> On Tue, 24 Sep 2019 at 11:31, Matus UHLAR - fantomas <uhlar@fantomas.sk>
>> wrote:
>> > I would just like to note that all those reject_rbl_client directives are
>> > prone to errors when any of those blacklist fails.

>Dominic Raferd:
>> An occasional individual blacklist lookup failure is not a problem, and is
>> rare (except for b.barracudacentral.org). I have not felt the need for
>> postscreen but of course it is a good tool: I prefer to block by ip last
>> and to log helo, envelope sender & recipient as well as client ip. This
>> puts a little more load on the server, but information is power.

On 24.09.19 07:08, Wietse Venema wrote:
>Postscreen logs the helo, sender, recipient, client IP address
>and client port when it rejects a connection.

... and dnsblog logs all blacklists the IP was found in.
Even more than standard smtpd (which only uses and logs first match).
-- 
Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
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